Malware Analysis Report

2024-09-23 11:52

Sample ID 240614-rvlbqaybnr
Target avast_free_antivirus_setup_online.exe
SHA256 1d47bc46cdd99ed0d081c9995e1f593b20a67dc651ff2a37706db26040ed81e9
Tags
bootkit persistence
score
6/10

Table of Contents

Analysis Overview

MITRE ATT&CK Matrix

Analysis: static1

Detonation Overview

Signatures

Analysis: behavioral1

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis: behavioral2

Detonation Overview

Command Line

Signatures

Processes

Network

Files

Analysis Overview

score
6/10

SHA256

1d47bc46cdd99ed0d081c9995e1f593b20a67dc651ff2a37706db26040ed81e9

Threat Level: Shows suspicious behavior

The file avast_free_antivirus_setup_online.exe was found to be: Shows suspicious behavior.

Malicious Activity Summary

bootkit persistence

Writes to the Master Boot Record (MBR)

Executes dropped EXE

Suspicious behavior: LoadsDriver

Suspicious use of SetWindowsHookEx

MITRE ATT&CK Matrix V13

Analysis: static1

Detonation Overview

Reported

2024-06-14 14:30

Signatures

N/A

Analysis: behavioral1

Detonation Overview

Submitted

2024-06-14 14:30

Reported

2024-06-14 14:33

Platform

win7-20240508-en

Max time kernel

144s

Max time network

152s

Command Line

"C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe"

Signatures

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe

"C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 v7event.stats.avast.com udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp

Files

N/A

Analysis: behavioral2

Detonation Overview

Submitted

2024-06-14 14:30

Reported

2024-06-14 14:33

Platform

win10v2004-20240508-en

Max time kernel

144s

Max time network

149s

Command Line

"C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe"

Signatures

Writes to the Master Boot Record (MBR)

bootkit persistence
Description Indicator Process Target
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\Desktop\avast_free_antivirus_setup_online.exe N/A
File opened for modification \??\PhysicalDrive0 C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe N/A

Executes dropped EXE

Description Indicator Process Target
N/A N/A C:\Users\Admin\Desktop\avast_free_antivirus_setup_online.exe N/A

Suspicious behavior: LoadsDriver

Description Indicator Process Target
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A
N/A N/A N/A N/A

Suspicious use of SetWindowsHookEx

Description Indicator Process Target
N/A N/A C:\Users\Admin\Desktop\avast_free_antivirus_setup_online.exe N/A

Processes

C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe

"C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe"

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe

"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=1276,i,1809100026287847100,9768898026582633513,262144 --variations-seed-version --mojo-platform-channel-handle=996 /prefetch:8

C:\Users\Admin\Desktop\avast_free_antivirus_setup_online.exe

"C:\Users\Admin\Desktop\avast_free_antivirus_setup_online.exe"

Network

Country Destination Domain Proto
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 v7event.stats.avast.com udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 iavs9x.u.avcdn.net udp
US 8.8.8.8:53 v7event.stats.avast.com udp

Files

C:\Users\Admin\AppData\Local\Temp\avast_free_antivirus_setup_online.exe

MD5 b73d0e9ae44340a04db9a17f6b390c1b
SHA1 ce4abb30b7b7ba2fbd5a19f9b59872e6f7c1789d
SHA256 1d47bc46cdd99ed0d081c9995e1f593b20a67dc651ff2a37706db26040ed81e9
SHA512 659708747c77b353e6c9f2a69679f3b99234400309567953e3a007cb0d80a27d54663995d569537537efaf9d18749787ff11dbc28aa29daaa61d2b911e5f2adc